I'm trying to play back a blu ray disc in my Panasonic internal blu ray drive via Power DVD Ultra on windows and i'm getting stuttering video and audio. For some reason it seems like windows is the problem. I get image and sound fine. But after a second or two of playing it begins to stutter and plays slow frame by frame. I have an early 2008 17" macbook Pro with 4GB ram 2.6 core 2 duo and an nvidia 8600GT with 512MB of ram.